Fault-Protected, 12-Bit ADCs

with Software-Selectable Input Range

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

PARAMETERS

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Converting

400

850

Standby power-down

mode

510

Input Current

Full power-down mode

1

µA

POWER REQUIREMENTS

Supply Voltage

4.75

5

5.25

V

Bipolar

2.4

4

Converting

Unipolar

2.2

3

mA

Standby power-down mode

400

700

Supply Current

(Internal Reference Mode)

Full power-down mode

1

µA

Bipolar

1.5

2.5

Converting

Unipolar

1.2

2.0

mA

Standby power-down mode

200

450

Supply Current

(External Reference Mode)

Full power-down mode

1

µA

External reference = 4.096V

±0.3

±

1.0

Power-Supply Rejection

Ratio (Note 3)

PSRR

Internal reference

±

0.5

LSB

TIMING

Clock Frequency Range

0.1

1.4

MHz

T/H Acquisition Time

(Note 4)

2.85

µs

Conversion Time

(Note 4)

8.57

µs

Throughput Rate

87.5

ksps

Internal Reference Settling Time

REF bypass capacitor initially discharged

2

ms

Device Power-Up Time

External reference mode

10

µs

DIGITAL INPUTS (DIN, SCLK, and

CS)

Input High-Threshold Voltage

2.4

V

Input Low-Threshold Voltage

0.8

V

Input Hysteresis

0.2

V

Input Leakage Current

-10

+10

µA

Input Capacitance

15

pF

DIGITAL OUTPUT (DOUT)

0.4

Output Voltage Low

0.6

V

Output Voltage High

- 0.5

V

Three-State Leakage Current

-10

+10

µA

Three-State Output Capacitance

15

pF